Torsion balance for measuring differences of gravity



Oct. 29, 1929. HAALCK 1,733,407

TORSION BALANCE FOR MEASURING DIFFERENCES OF GRAVITY Filed July 31. 1926 Fig. 1.

in Vera Z01" J-Zczns Hebe/50. By v.4 J g .1 14 a I Patented Oct. 29,1929

UNITED STATES PATENT OFFICE HANS HAALCK, 01!? BERLIN-STEGIITZ, GERMANY, ASSIGNOR TO THE FIRIBI: EXPLORA- DION BODENUNTEBSUCHUNGS & VERWERTUNGS-G, M. B. 3., OF BERLIN, GERMANY TORSION BALANCE FOR MEASURING DIFFERENCES OI GRAVITY Application filed July 31, 1926, Serial No. 126,186, and in Germany Kay 8, 1926.

The Eotvos torsion balance is constructed with horizontal beams; one weight beingplaced level with or above the'beam and the other weight below the beam. Practically the beam may have any form, but the weights 10 In this invention the form of the beam is such as to simplify the construction of the whole apparatus and to aflord a convenient handling of the instrument without disturbin its sensitiveness.

Ihe construction of the invention is, shown in the drawing in which:

Figure 1 is an axial vertical section of my torsion balance.

Figure 2 is a similar View showing the vertical beam partially in section.

To the ends of a vertical beam A A horizontal or oblique beams are aflixed which bear the weights P and P torsion wire 1 is attached to the axis A "and A ;In order to avoid a tilting over of the beam, the point of suspension must be above the center of gravity of the hanging system.

By movement of a small wei ht Q (Fig. 1) fixed to the lower beam in the irection of the torsion wire 1 the center of gravity may be I lowered.

By constructing according to this description it is possible to surround the torsion wire and the beam with the same case thus reducing the size and weight of the whole apparatus and securing more convenient handling.

A tube may be used for the vertical beam A A and the torsion wire 1 may be lead through it, see Fig. 2.

It is not. necessary should be straight. It may be a broken line and may, for instance, have two small rectangular turns vertical beam and the oint of suspension should be enclosed by tie same case.

It is best to form the whole system P A A P from one piece of turned tube.

Claims:

At a small lateral lug O, at any level, the

that the vertical beam but it is necessary that the 1. A torsion balance comprising a beam, means for suspending the beam so that its longitudinal axis is substantially vertical, and weights located laterally to the beam at vertically-separated points along said vertical beam by means of laterally extending ,7

arms.

2. A torsion balance comprising a beam, means for suspending the beam so that its longitudinal axis is substantially vertical, auxiliary beams extending laterally secured at vertically-Se arated points along said vertical beam, an weights secured to said auxiliary beams.

'3. A torsion balance comprising a tubular beam, a suspension wire for suspending said beam so that its longitudinal axis is substantially vertical, auxiliary beams extending laterally secured at vertically-separated points along said vertical beam, and weights secured to said auxiliary beams.

4. A torsion balance comprising a beam,

means for suspending the beam so that its longitudinal axis is substantially vertical, weights located at vertically separated points along said vertical beam, means for attaching said weights b auxiliary beams extending laterally to sai vertical beam and a movable weight slidably attached to said auxiliary beam.

5. A torsion balance comprising a beam, a lateral lug on the beam, means secured to said lug for suspending the beam so that its longitudinal axis is substantially vertical, and weights located laterally to said beam at vertically-separated pointsalong said vertical beam by means of laterally extending arms.

6. A torsion balance comprising a tubular beam, 2. suspension wire led through said tubular beam and adapted to suspend said beam so that its longitudinal axis is substantially vertical, auxiliary beams extending laterally secured at vertically-separated points along said vertical beam, and weights secured HANS HAALCK. 

